63results about How to "Maintain structural stability" patented technology

The invention relates to a permanent magnet synchronous motor design method based on a multi-objective optimization algorithm, and the method achieves the efficient design and optimization of a permanent magnet synchronous motor through the combination of finite element simulation, multi-physical field coupling analysis, neural network performance prediction, and a hybrid optimization algorithm of a genetic algorithm and particle swarm optimization. The method comprises the following steps: determining a plurality of design targets according to an application scene of a motor, selecting key design variables, performing data cleaning and normalization processing, performing electromagnetic field, thermal field and mechanical field simulation by using a multi-physics field coupled finite element model, predicting the performance of the motor by combining LSTM and Transform neural network models, expanding a training data set through a data enhancement technology, and performing data enhancement on the motor. Finally, a hybrid optimization algorithm combining a genetic algorithm and particle swarm optimization is adopted to carry out global optimization and adaptive adjustment of design parameters, and a Pareto optimal leading edge is utilized to find out an equilibrium solution between design targets, so that the accuracy and efficiency of motor design are improved, and the method is suitable for various motor design scenes.

The invention discloses an electrocatalyst material for in-situ production of hydrogen peroxide through oxygen reduction as well as a preparation method and application of the electrocatalyst material, and belongs to the field of organic wastewater treatment. MoS2 / Fe porous conductive particles and a high-molecular polymer are adopted as main components, and ethanedioate and polyacrylamide are combined as a dispersion auxiliary solvent and a pore-forming agent to form a three-dimensional composite conductive catalyst material; through ultralow-temperature freeze drying and microwave radiation technologies, the material structure is optimized, the catalytic reaction active sites are improved, and efficient electrocatalytic oxygen reduction for in-situ production of hydrogen peroxide is realized; the MoS2 / Fe porous conductive particles not only optimize the performance of the catalyst, but also realize high-valued utilization of solid wastes; the electrocatalyst material has excellent conductivity, catalytic activity and organic wastewater degradation capability, is stable in removal effect before and after use, can be repeatedly used for multiple times, reduces the use cost, and provides a wide application prospect for the fields of environmental protection, energy and the like.

The invention discloses a panel lamp light source integration system based on a flexible circuit board, and relates to the technical field of panel lamp light source integration. Generating an initial design drawing of the flexible circuit board containing a plurality of layers of conductive circuits and a plurality of light source bonding pads; the channel configuration module configures a driving control channel for the bonding pad and establishes a mapping table with the lighting function area; the thermal load optimization module calculates power consumption and thermal load distribution according to the mapping table and the performance parameters and adjusts routing topology to generate a final design drawing; and the manufacturing and assembling module is used for manufacturing a circuit board according to the drawing and mounting a micro light source to finish assembling. Wiring is matched with the shape of a panel and the characteristics of a light source during planning, heat distribution optimization is achieved in the layout stage, the number of times of modification is reduced, and local overheating is restrained. According to the invention, high-fit compact integration of the flexible circuit board and the panel lamp is realized, and the assembly efficiency and the operation stability are improved.

The invention discloses a purification method and a purification device for crystallized magnesium, and relates to the field of magnesium metal smelting. The method comprises the following steps: under the protection of an inert atmosphere, firstly carrying out pressure-applying melting treatment on a magnesium material to be smelted, and then carrying out pressure-applying filtering treatment on a product obtained after the melting treatment, so as to complete the flux-free smelting process of the magnesium material. And meanwhile, the metal magnesium liquid and most of the oxide shells are separated by utilizing the liquidity difference between the liquid metal magnesium and the solid oxide shells. Compared with a conventional smelting process without pressure application, the method has the advantages that the melting rate of the crystallized magnesium can be remarkably increased, most of oxide impurities are removed, a series of pollution problems caused by flux use are solved from the source, and low-cost, high-efficiency and high-quality smelting of the crystallized magnesium is realized.

The invention discloses a barium titanate-based leadless piezoelectric ceramic material and a preparation method and application thereof, and relates to the technical field of functional materials, the chemical formula of the barium titanate-based leadless piezoelectric ceramic material is Ba0. 9Sr0. 1Ti1-xSnxO3, x = 0-0.10, and x represents a mole fraction. By regulating and controlling the concentration of Sn ions in the BT-based lead-free piezoelectric ceramic, a multiphase structure with flat free energy is formed near the room temperature, meanwhile, an unconventional short-range disorderly-arranged polar snow-mud-state domain structure is induced, an extremely good domain change dynamic behavior is shown under the action of an external field, and the piezoelectric ceramic is prepared. Meanwhile, excellent piezoelectric property, electrostrictive property, electrocaloric property and mechanical property are obtained, and a candidate material is provided for a new generation of multifunctional high-precision electronic information devices.

The invention discloses a low-smoke halogen-free polyolefin insulating layer fireproof cable. According to the low-smoke halogen-free sheath fireproof cable disclosed by the invention, excellent flame retardant property and low-smoke emission characteristic are realized by optimizing a multi-layer structural design and selecting specific material combination. The polyolefin insulating layer adopts the combination of modified polyethylene and EVA (Ethylene Vinyl Acetate), so that the elasticity and the thermal stability of the cable are enhanced; through the synergistic effect of magnesium hydroxide, aluminum hydroxide, kaolin and glass fibers, the flame retardant property and the mechanical strength of the mineral fireproof layer are remarkably improved; the polyolefin elastomer, the polypropylene blend, the nanoscale magnesium hydroxide and other materials in the low-smoke halogen-free sheath provide excellent low-smoke and environment-friendly flame-retardant effects, and meanwhile, the durability and the structural stability of the cable are kept.

In order to solve the problem that high-rate discharge performance and high-temperature cycle performance of a lithium ion battery in a low-temperature environment are difficult to consider in the prior art, the invention provides a lithium ion battery which comprises a positive plate, a negative plate and an electrolyte, the positive plate comprises a positive electrode material layer, and the positive electrode material layer comprises a positive electrode active material and a solid electrolyte; the electrolyte comprises a first additive; the first additive comprises at least one of the following compounds: # imgabs0 #; the lithium ion battery satisfies the following conditions: 1.25 < = L / (D * S) < = 5; s% is the mass percentage content of the first additive in the electrolyte; l% is the mass percentage content of the solid electrolyte in the positive electrode material layer; and D [mu] m is the median particle diameter D50 of the solid electrolyte in the positive electrode material layer. According to the lithium ion battery provided by the invention, by adding the solid electrolyte and the first additive and adjusting the relationship among the first additive, the solid electrolyte and the median particle size D50 of the solid electrolyte in the positive electrode material layer, the high-rate discharge and high-temperature cycle performance of the lithium ion battery in a low-temperature environment is improved.

The invention discloses a high-temperature-resistant UV highlight plate and a preparation process thereof, and belongs to the technical field of UV highlight plates. The high-temperature-resistant UV highlight plate comprises an MDF base material, the MDF base material contains a moisture-proof solvent, the surface of the MDF base material is sequentially coated with a seal primer, a modified epoxy resin bottom coating, a middle coating and a surface coating, and the middle coating contains nano titanium dioxide, an organosilicon compound and a silane coupling agent. According to the high-temperature-resistant UV highlight plate and the preparation process thereof, MDF containing a moisture-proof solvent is adopted as a base material, paraffin emulsion forms a layer of hydrophobic film to reduce moisture permeation, a silane coupling agent can improve interface bonding between fibers and resin and improve the moisture resistance, polyvinyl alcohol can enhance the bonding force between the fibers and reduce moisture absorption, and the high-temperature-resistant UV highlight plate is prepared. When the additives are used at the same time, the additives can complement each other to jointly improve the moisture resistance and mechanical property of the MDF base material, so that the high temperature resistance of the material is improved.

The invention relates to the field of assembly type subway station structure engineering. The buffering and vibration isolation device comprises two bottom plates and two frames, the number of the bottom plates is two, the number of the frames is two, and the frames are arranged at the top ends of the bottom plates; the transverse rods are installed at the top ends of the two bottom plates correspondingly and located on the inner sides of the two frames, and a plurality of rectangular through grooves are formed in the transverse rods; the plurality of longitudinal rods respectively penetrate through the plurality of rectangular through grooves; according to the transverse vibration isolation mechanism, when the cross beam is subjected to transverse force, a baffle moves in a shell, a fourth spring is attached to a cylinder to stabilize deformation buffering, a first elastic piece and a second elastic piece are matched through an inclined face or a protrusion, transmission force is evenly distributed, cooperative buffering is achieved, and impact vibration generated when the beam column connection is subjected to longitudinal and transverse force is effectively reduced; the service life of the device is prolonged; and the safe and stable operation of the structure is maintained.

The invention discloses a circuit board processing clamper and a method thereof which are easy to balance, and relates to the technical field of circuit board clampers. The clamper comprises a base, a mounting groove is provided on the top of the base, and a clamping device, a balancing device and an auxiliary device are arranged above the base; the circuit board is placed on a placement plate, and the clamping device on the right side is driven to move by a rotating motor 1 in cooperation with a lead screw 1, a spiral groove 1, a moving block and a fixing frame 1, at which time both sides of the circuit board are initially fixed by a clamping block and a spring, and the clamping plate is moved upward in cooperation with a T-shaped block and a limiting groove so that the circuit board loses its clamping effect, thereby preventing physical damage to the circuit board during the clamping process, such as breakage, scratches or circuit short circuit, and the circuit board is rotated by rotating a rotating rod in cooperation with the placement plate, and the rotating plate allows operators to more easily reach different parts of the circuit board, thereby improving the comfort and efficiency of the operation.

The invention relates to the field of carbon nanomaterials, and particularly discloses a preparation and storage method and application of near-infrared super carbon nanodots. The invention provides a preparation method of super carbon nanodots, which comprises the following steps: carrying out primary assembly by standing a carbon nanodot solution at normal temperature for a preset period of time, and then carrying out secondary assembly under low-temperature, dry and sealed conditions, thereby obtaining the super carbon nanodots. The light absorption range of the super carbon nanodots prepared by the method approaches to a near-infrared region, the light absorption wave band is greatly widened, and the super carbon nanodots show potential application value in the medical field. Compared with the prior art, the preparation method provided by the invention can be used for successfully preparing in a dry environment, and the dependence on a water medium in a traditional method is abandoned. Meanwhile, the super carbon nanodot prepared by the invention has the capability of being stored for a long time in an aqueous solution or dry state under a low-temperature condition; wherein when stored in a dry state, the structural stability and the performance integrity of the composite material can be more effectively maintained, and the effective storage life of the composite material is prolonged.

The invention belongs to the technical field of electrochemical catalytic materials, and relates to an efficient non-iridium nickel-based catalyst and a preparation method thereof. Comprising a nitrogen-sulfur bifunctional in-situ doped and modified nickel-cobalt layered double hydroxide nanosheet, 2, 5-dihydroxy terephthalamide, a conductive carbon carrier, a pore-forming agent, a surface wetting agent and a cross-linking agent. The nickel-cobalt layered double hydroxide is prepared by carrying out hydrothermal reaction and calcination treatment on nickel nitrate hexahydrate, cobalt nitrate hexahydrate, thiourea and melamine under an alkaline condition, and synergistic doping of nitrogen and sulfur bifunctional groups is realized; organic-inorganic interface interaction is introduced into 2, 5-dihydroxy terephthalamide, so that the structural stability of the material is enhanced. According to the invention, the current density, the mass activity, the gas production volume, the stability and the turnover performance are obviously improved. According to the invention, the defects of insufficient conductivity, limited active sites and poor cycling stability of the existing nickel-cobalt-based catalyst are effectively overcome, and a new thought is provided for developing a low-cost and high-performance electrochemical catalyst.

The invention discloses a construction method of an FRP (Fiber Reinforce Plastic) constrained fly ash geopolymer roadside filling body, which relates to the technical field of coal mining, and comprises the following steps: firstly, preparing a prefabricated FRP pipe, a filling mold bag, a filling material containing fly ash and the like, and a related filling system; after the working face is pushed, preparation work such as top plate supporting is carried out, and then the prefabricated FRP pipe and the filling mold bag are installed to form a to-be-filled pipe column. The fly ash and other materials are stirred by a stirring station to prepare the fly ash-based geopolymer filling material, the filling material is injected into a pipe column filling mold bag, and after filling, an ultra-high molecular weight polyethylene belt is used for winding. And constructing an air leakage prevention wall comprising a metal net, air duct cloth and a reinforcing mesh, and laying a concrete layer to seal the goaf. According to the method, waste such as fly ash is fully utilized, the construction cost is reduced, the thermal damage problem of the high-temperature mine filling body is solved, the bearing capacity of the filling body is improved by means of FRP constraint, the gob-side entry retaining roof supporting effect is guaranteed, the coal resource recovery rate is increased, and coal-pillar-free continuous mining is promoted.

The utility model discloses junction box aerosol fire extinguishing equipment, and particularly relates to the technical field of fire extinguishing equipment, the junction box aerosol fire extinguishing equipment comprises a junction box body, the rear wall of the inner cavity of the junction box body is fixedly connected with a controller, the front side of the middle part of the right wall of the inner cavity of the junction box body is provided with a fixing mechanism, and the left end of the fixing mechanism is fixedly connected with an aerosol device; the left side of the outer surface of the aerosol device is fixedly connected with a rotating mechanism. According to the aerosol fire extinguishing equipment for the junction box disclosed by the utility model, a plurality of steps of punching, positioning, tightening and the like are not needed when an aerosol device is mounted through the arranged fixing mechanism, and the equipment can be quickly fixed only by aligning an internal structure of the aerosol fire extinguishing equipment to a proper position of the junction box body; physical damage to the junction box body is fundamentally avoided, the service life of the junction box is prolonged, the rotating mechanism can continuously rotate by 360 degrees, and aerosol body fire extinguishing agents are evenly distributed to all spaces of the junction box in an omnibearing mode.

The invention discloses a carbon nanotube gel, a gel electrolyte and a preparation method and application thereof. The carbon nanotube gel comprises a carbon nanotube, gel, an ionic liquid and water, wherein the mass ratio of the carbon nanotubes to the gel is 1: (1-13); the mass ratio of the carbon nanotubes to the ionic liquid is 1: (1-13); the mass ratio of the carbon nanotubes to the water is 1: (9-100). The carbon nanotube gel has good conductivity, flame retardance and photo-hydrothermal evaporation capacity, has excellent photo-thermal conversion efficiency and salt crystallization resistance, not only can efficiently absorb solar energy and convert the solar energy into heat energy so as to accelerate seawater evaporation, but also can keep the performance stability for a long time, and has good application prospects. And a green and efficient solution is provided for seawater desalination.

The utility model discloses a mechanical element clamping and unloading device which mainly solves the problems that manual operation wastes time and is low in working efficiency. The device comprises a bottom shell and a rotating rod, a motor is arranged in the bottom shell, and a fixing ring is arranged on the upper surface; the lower end of the rotating rod is connected with the output end of the motor, and a transverse plate is fixed to the upper end of the rotating rod. Symmetrical single-face racks are arranged on the inner side of the rectangular fixing shell, symmetrical L-shaped plates are arranged on the outer sides of openings in the two sides, and transmission mechanisms are arranged in the L-shaped plates. The transmission mechanism comprises a double-sided rack and a gear meshed with the double-sided rack; the upper end of the double-sided rack is connected with the upper cross arm of the fixing shell through a fixing rod, and the lower end is attached to the fixing ring through the lower cross arm and the cross plate of the fixing shell; the side, close to the L-shaped plate, of the gear is meshed with a single-face rack, a limiting rod is sleeved with the single-face rack, and a connecting block is arranged on the outer side of the single-face rack. And the outer sides of the connecting blocks are fixedly connected with the corresponding L-shaped plates. The automatic clamping device can automatically clamp mechanical elements, improves working efficiency and can be used for an industrial production line.

The invention provides an air duct assembly and a clothes dryer with the same. The air duct assembly comprises an air duct shell defining an air duct; the mounting assembly is arranged at the side part of the air duct shell; a mounting groove communicated with the air duct is formed in the second mounting assembly; at least part of the first mounting assembly is movably arranged so as to move to a closed position where at least part of the first mounting assembly covers the notch of the mounting groove or an avoiding position where at least part of the first mounting assembly and the notch are mutually avoided; the heating body is detachably arranged on the air duct shell; when the heating body is installed on the air duct shell, the heating body abuts against at least part of the first installation assembly so that at least part of the first installation assembly can be located at the avoiding position, and a heating part of the heating body is arranged in the installation groove and is opposite to the air duct. By means of the technical scheme, the technical problem that in the prior art, a heating body in an air duct assembly is not convenient to assemble rapidly can be solved.

The invention relates to the technical field of PEEK materials, and particularly discloses a novel PEEK material for preparing a fan frame and a preparation process of the novel PEEK material. The novel PEEK material for the fan frame body is prepared from the following raw materials in parts by weight: 55 to 60 parts of PEEK, 9 to 12 parts of polytetrafluoroethylene, 2 to 5 parts of compatilizer, 1 to 2 parts of antioxidant, 15 to 20 parts of carbon fiber and 7 to 10 parts of modified glass fiber. The prepared novel PEEK material for the fan frame body has relatively good strength, rigidity and wear resistance, can bear vibration and impact generated during operation of a fan, and prolongs the service life of the fan frame body.

The invention provides a metal-based ceramic composite wear-resistant material and a preparation process thereof, and belongs to the technical field of metal-based ceramic materials. The preparation method comprises the following steps: firstly, forming a carboxylated carbon nanotube flexible layer and a metal Ti reinforced layer on the surface of a ceramic particle through two-stage coating of the ceramic particle and low-temperature ultrasonic relaxation cooperative treatment, then mixing with metal matrix powder, molding and sintering, and finally, carrying out ultrasonic relaxation treatment at 15-25 DEG C. The preparation method comprises the following steps: firstly, forming a carboxylated carbon nanotube flexible layer and a metal Ti reinforced layer on the surface of the ceramic particle; according to the process, low-temperature aging micro-crack initiation is effectively inhibited, the number of micro-cracks is only 1.8 / mm < 2 > after the material is aged for 1000 h at the temperature of-10 DEG C, the interface bonding strength reaches 256.7 MPa, the wear resistance attenuation rate is only 9.9%, and the material can be stably adapted to mining machinery scenes in alpine regions.

The utility model relates to the technical field of batteries, and discloses a collector plate structure which comprises a shell assembly, a pole is arranged in the center of the top of the shell assembly, a collector plate is welded to the top of the inner side of the shell assembly, a middle protruding face is arranged in the center of the top face of the collector plate, and a middle thinning groove is formed in the top face of the middle protruding face. According to the utility model, after the through hole of the pole mentioned in the step 3 and the collector plate are assembled, a welding position is formed at the contact part, and then laser landing edge welding is carried out, so that a battery manufacturer can ensure high quality and high reliability of a battery assembly by adopting a laser landing edge welding technology; and meanwhile, the production efficiency is improved, the cost is reduced, laser welding becomes one of the preferred welding technologies in the battery manufacturing industry through the advantages, and the beneficial effects of improving the production efficiency and controlling the cost are achieved.

The utility model relates to a fabricated building wallboard and the technical field of noise reduction thereof, in particular to a porous composite metamaterial sea sand acoustic board which comprises a wall body component, a main wall body, an auxiliary wall body connected with the main wall body, a sandwich board arranged in the main wall body and grouting holes formed in the surfaces of the main wall body and the auxiliary wall body. The fixing component comprises a side fixing plate connected with the wall body component, a main top fixing plate connected with the main wall body and an auxiliary top fixing plate connected with the auxiliary wall body; wherein the porous composite metamaterial sandwich layer is composed of a plurality of unit cells, and each unit cell comprises a polyester fiber board fixedly connected with the main wall body and the auxiliary wall body and an aluminum alloy insertion board arranged in the polyester fiber board. According to the utility model, the surface layers of the main wall body and the auxiliary wall body are the sea sand acoustic boards which are formed by polymerizing natural sand grains through a cementing material, so that the sound absorption design requirements of different frequency bands can be met by adjusting the pore size, the plate thickness and the sound absorption performance of the acoustic boards according to the size of the particle size of the sea sand.

The utility model provides an infrared heating device for a tungsten steel milling cutter, which relates to the technical field of tungsten steel milling cutters and comprises a protective shell, a mounting circular ring and a mounting circular plate are respectively arranged in an inner cavity of the protective shell, a plurality of mounting grooves are formed in the top of the mounting circular ring, and two supporting rods are arranged below the inner cavity of the protective shell. The bottoms of the supporting rods penetrate through the bottom of the inner cavity of the protective shell through shaft sleeves to be fixedly connected with belt wheels, and one end of one supporting rod penetrates through the bottom of the mounting circular plate through the shaft sleeves to extend into the inner cavity of the mounting circular plate. According to the utility model, the infrared radiation of the infrared heater can uniformly cover the surface of the tungsten steel milling cutter, so that a more uniform heating effect is realized, the structural stability and performance of the tungsten steel milling cutter are kept by uniform heating, the processing quality is ensured, the time is saved, the heating efficiency is improved, and the energy waste is reduced.

The invention discloses a carbon-coated tin nanoparticle, a preparation method thereof and a lithium ion battery material thereof, and relates to the field of battery materials, the preparation method comprises the following steps: dissolving bacillus subtilis spores in deionized water, and adding glucose for activation culture to obtain supernate; adding SnCl4, and incubating to obtain a suspension liquid; adding a complexing agent, carrying out ultrasonic treatment, and centrifuging to remove a complex, so as to obtain centrifugate; centrifugally collecting precipitates; dissolving the precipitate in deionized water, and carrying out ultrasonic oscillation to obtain a solution; the method comprises the following steps: dissolving a carbon nanotube or graphene oxide in a solvent to obtain a carbon nanotube solution or a graphene oxide solution; mixing the solution with the carbon nanotube solution to obtain a mixed solution; freezing and drying; and placing the powder in a protective gas atmosphere for high-temperature annealing to obtain the product. The method has the beneficial effects that voids in the bacterial carbon shell relieve volume expansion of tin particles in lithiation and lithium removal processes, and the carbon nanotubes uniformly integrated in the bacterial carbon shell serve as efficient electron conduction channels to disperse anisotropic stress.

The utility model discloses a surface laser cladding preheating and slow cooling device which comprises a constant-temperature box, an operation room is arranged on the constant-temperature box, four fans are arranged in the operation room, the fans are fixedly connected with the constant-temperature box, a dust screen is arranged at the tops of the four fans, the dust screen is fixedly connected with the constant-temperature box, and a heating unit is arranged at the top of the dust screen. The heating unit is fixedly connected with the constant temperature box, air deflectors are arranged at the tops of the two ends of the heating unit, the air deflectors are fixedly connected with the constant temperature box, two air guide grooves are formed in the constant temperature box, the air deflectors are arranged at the input ends of the air guide grooves, and two air collecting pipes are arranged in the operation chamber and fixedly connected with the constant temperature box. An air inlet and a plurality of air outlets are formed in the top end of the air collecting pipe. According to the utility model, thermal stress is effectively reduced, and material deformation and stress concentration caused by temperature difference are reduced, so that the risk of crack generation is reduced, and hot cracks caused by rapid cooling are avoided.

The invention belongs to the technical field of energy storage, and particularly relates to active slurry, a positive pole piece as well as a preparation method and application thereof. The invention relates to an active slurry, which comprises an active material and an organic solvent, and the solid content of the active slurry is 45wt%-60wt%; the active material comprises the following raw materials in percentage by mass: 93.5 wt%-97.5 wt% of an active substance; 1.5 wt% to 4.0 wt% of a binder; and 1.0 wt%-2.5 wt% of a conductive substance.

The application provides a coating slurry, a preparation method and application thereof, and belongs to the technical field of lithium ion batteries.The preparation method is as follows: dispersing agent, ceramic particle modifier and nano inorganic ceramic particles are dissolved in deionized water, stirring and dispersing until uniform, and then grinding and secondary dispersing; subsequently, water-soluble acrylate-based polymer solution and polyurethane-based polymer emulsion are added, stirring and dispersing until uniform, and then adding a textural structure forming aid and stirring until uniform; finally, a wetting agent is added, stirring and slowly defoaming, and the coating slurry is obtained.The coating slurry provided by the application has heat shrinkage resistance of 150-200 DEG C when applied to a diaphragm, has water resistance, can be coated twice, and can be widely applied to the field of batteries.

The invention relates to an electro-catalysis CO2 reduction catalyst, in particular to a fluorocarbon chain modified carbon-based hydrophobic electro-catalysis CO2 reduction catalyst as well as a preparation method and application thereof, and belongs to the technical field of electro-catalysis. The method comprises the following steps: S1, heating a carbon nano tube at the temperature of 400 to 500 DEG C for 0.5 to 1.5 hours to remove impurities contained in the carbon nano tube; s2, carrying out oxidation treatment on the carbon nanotubes to introduce hydroxyl groups; s3, carrying out ultrasonic treatment on the oxidized carbon nanotube obtained in the step S2 in a solvent DMF environment so as to load the molecular catalyst; and S4, carrying out hydrophobic modification on the oxidized carbon nanotubes loaded with the molecular catalyst in the S3 in a silane aqueous solution by using silane. Through a covalent bond connection strategy, a fluorocarbon chain of silane with excellent hydrophobicity is stably anchored on the surface of the carbon nanotube, so that the problems that the hydrophobicity of a catalytic electrode prepared from an existing carbon-based catalyst is easy to lose, the catalytic performance is easy to reduce, the stability is not high and the like in a reaction are solved.

The invention belongs to the field of building materials, and particularly relates to a type II anhydrite fireproof coating with high later strength and large spraying area and a preparation method thereof, and the type II anhydrite fireproof coating is prepared from the following raw materials: type II anhydrite, building gypsum, cement, glass beads, sepiolite, hydroxypropyl methyl cellulose, rubber powder, starch ether, sulfate and an air entraining agent. The II-type anhydrous gypsum fireproof coating with high later-stage strength and large spraying area obtained by the invention has the advantages of large spraying area, high later-stage strength, reduced total cost and stable later-stage overall strength, and solves the problems of poor early-stage strength of a cement fireproof coating and poor later-stage strength of a desulfurized gypsum fireproof coating. When the coating thickness is the same as that of a cement fireproof coating and a desulfurized gypsum fireproof coating, the density is low after water is evaporated, the heat conductivity coefficient is low, and the heat insulation performance is good. The fireproof insulation board has good fireproof performance, can keep structural integrity and stability at high temperature, has longer fire endurance than cement and desulfurized gypsum at the same temperature, and plays roles in effectively preventing fire, isolating and delaying fire spreading.

The invention provides a moisture-absorbing, sweat-releasing, waterproof and moisture-permeable mesh knitted fabric composite coating fabric as well as a manufacturing method and application thereof. The moisture-absorbing, sweat-releasing, waterproof and moisture-permeable mesh knitted fabric composite coating fabric is a three-layer mesh knitted fabric which is woven by taking wool / hemp viscose / vinylon hollow yarns and the like as raw materials and is coated with a layer of waterproof and moisture-permeable polyurethane film. Belongs to the technical field of functional textile processing and manufacturing methods. The three-layer gradient mesh composite coating knitted fabric is manufactured by adopting the wool / China-hemp viscose / vinylon hollow yarn through a fabric structure design and transfer coating process, has moisture absorption and sweat releasing performance and waterproof and moisture permeable performance, and can be used as a fabric of underwear, leisure, outdoor sports, winter warm-keeping clothes and the like.

The invention relates to a low-temperature ALD lamination passivation method and equipment for improving the performance of a crystal silicon slice battery, and the method comprises the following steps: providing a silicon-based battery sample with a complete new side section, stacking a plurality of battery pieces in a piece box, and only exposing the side sections in a cavity; at the temperature of 50-140 DEG C, sequentially growing a SiO2 film and an Al2O3 film on the side section of the battery by adopting an ALD technology, and respectively taking the SiO2 film and the Al2O3 film as a first passivation layer and a second passivation layer; and completing side wall passivation and vacuum breaking, and taking out the wafer box carrying the sample for cooling. According to the method, ALD deposition is carried out in a low-temperature environment, so that thermal damage of high temperature to a battery piece is effectively avoided, and the uniformity and the structural stability of a passivation layer are kept; the laminated structure of the SiO2 and Al2O3 films can significantly reduce the recombination effect of minority carriers and improve the passivation effect, thereby improving the open-circuit voltage and conversion efficiency of the cell.